Is it easy for invention patents to enter the substantive examination stage?

Legal analysis: Before the substantive examination stage of the invention patent, it is a preliminary examination, which mainly includes two contents: (1) Examining the format of the patent application document: checking whether the patent application document is complete and whether its format meets the requirements. Those who pass the examination will be notified by the Patent Office and get the patent application number.

Legal basis: People's Republic of China (PRC) Patent Law.

Article 27 To apply for a patent for design, a written request, a picture or photograph of the design, a brief description of the design and other documents shall be submitted.

The relevant pictures or photographs submitted by the applicant shall clearly indicate the design of the product for which patent protection is required.

Article 28 The date when the patent administrative department in the State Council receives the patent application documents shall be the filing date. If the application documents are mailed, the postmark date of mailing shall be the application date.